MESON Chess Problem Database

Problem Display
PID: 68301 (8/2K2p2/3pk3/7B/1N3Q2/8/8/8 w - - 0 1)

Lincoln, Robert A

The Problemist, 2006

8/2K2p2/3pk3/7B/1N3Q2/8/8/8

#2

4 + 3

145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke7
      • 2.Qxf7#
    • 1...f5
      • 2.Qxd6#
    • 1...f6
      • 2.Qe4#
  • Tries
    • 1.Kd8?
      • threat
        • 2.Bxf7#
      • 1...f6
        • 2.Qe4#
      • 1...f5!
    • 1.Sd5?
      • threat
        • 2.Bxf7#
        • 2.Qe4#
      • 1...f5
        • 2.Qxd6#
      • 1...f6
        • 2.Qe4#
      • 1...Kxd5!
    • 1.Sa6?
      • 1...Kd5
        • 2.Bxf7#
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qxd6#
      • 1...f6
        • 2.Qe4#
      • 1...d5!
    • 1.Sc6?
      • threat
        • 2.Bxf7#
        • 2.Qxf7#
      • 1...f5
        • 2.Qxd6#
      • 1...f6
        • 2.Qe4#
      • 1...Kd5!
    • 1.Bg6?
      • threat
        • 2.Qxd6#
      • 1...Ke7
        • 2.Qxf7#
      • 1...d5
        • 2.Qd6#
      • 1...fxg6!
    • 1.Qf5+?
      • 1...Ke7
        • 2.Qxf7#
      • 1...Kxf5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qxf7#
      • 1...Kd5
        • 2.Bxf7#
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qxd6#
      • 1...f6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(B),XP(c)
    • P(c);SBLOCK::QAR1(B),XP(a)
    • P(c);SBLOCK::QAR2(B)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • B(C),XP(c)
      • Vars
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • P(c);
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAR1(B),XP(a)
        • P(c);::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT,XS(A)
    • Try
      • S(A);
      • Vars
        • K(b);S_FLIGHT::B(C),XP(c)
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(c);SBLOCK::QAR1(B),XP(a)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • P(a);
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAR1(B),XP(a)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(B),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(a);::QAR1(B)
      • Refutation
        • P(c);XB(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
  • Actual
    • S(A);
    • Threat
      • QAB1(B),XP(c)
    • Vars
      • K(b);S_FLIGHT::B(C),XP(c)
      • K(b);P-FLIGHT::QAR1(B),XP(c)
      • P(c);SBLOCK::QAR1(B),XP(a)
      • P(c);SBLOCK::QAR2(B)
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